backyard vs enclosure

backyard

noun
  • An area nearby to a country or other jurisdiction's legal boundaries, particularly an area in which the country feels it has an interest. 

  • A person's neighborhood, or an area nearby to a person's usual residence or place of work and where the person is likely to go. 

  • A yard to the rear of a house or similar residence. 

enclosure

noun
  • An area, domain, or amount of something partially or entirely enclosed by barriers. 

  • The area of a convent, monastery, etc where access is restricted to community members. 

  • The act of separating and surrounding an area, domain, or amount of something with a barrier. 

  • The act of enclosing, i.e. the insertion or inclusion of an item in a letter or package. 

  • Something enclosed, i.e. inserted into a letter or similar package. 

  • The act of restricting access to ideas, works of art or technologies using patents or intellectual property laws. 

  • The post-feudal process of subdivision of common lands for individual ownership. 

How often have the words backyard and enclosure occurred in a corpus of books? (source: Google Ngram Viewer )